CN112894045B

CN112894045B - Accurate automatic welding device of conductive slip ring

Info

Publication number: CN112894045B
Application number: CN201911137163.3A
Authority: CN
Inventors: 段荣; 张文亮; 刘宇轩; 董清宇; 余正海; 魏容; 李威
Original assignee: CHINA AEROSPACE TIMES ELECTRONICS CO LTD; Beijign Institute of Aerospace Control Devices
Current assignee: CHINA AEROSPACE TIMES ELECTRONICS CO LTD; Beijign Institute of Aerospace Control Devices
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2022-07-29
Anticipated expiration: 2039-11-19
Also published as: CN112894045A

Abstract

The invention relates to a precise automatic welding device for a conductive slip ring, belonging to the field of precise welding of instruments and meters; the device comprises a base, a conductive slip ring pickup system, an x-direction guide rail, a connecting frame, an automatic tin applying system, a laser welding system, a perforation alignment system, a slip ring base, a z-direction guide rail, a slip ring tray and a y-direction guide rail; the y-direction guide rail is fixedly arranged on the upper surface of the base along the y direction; the guide rail in the x direction is butted with the guide rail in the y direction along the x direction; the guide rail in the z direction is vertically butted with the guide rail in the x direction; the connecting frame is in butt joint with the guide rail in the z direction, and the conductive sliding ring pickup system is fixedly arranged on the connecting frame; the automatic tin applying system, the laser welding system, the perforation alignment system and the slip ring base are all arranged on the upper surface of the base; the slip ring tray is arranged on the upper surface of the slip ring base; the invention reduces the error caused by manual welding operation of operators and improves the consistency and reliability of the welding quality of the conductive slip ring and the electronic installation wire.

Description

Accurate automatic welding device of conductive slip ring

Technical Field

The invention belongs to the field of precision welding of instruments and meters, and relates to a precision automatic welding device for a conductive slip ring.

Background

The conductive slip ring is used as a key component of the conductive rod, has the characteristics of long production period and unrepairable property, the problems of circuit breaking and insulation are closely related to the welding quality of the slip ring, and once the static resistance is overlarge, the circuit breaking or the insulation between rings is out of tolerance, the product is scrapped. The diameter of an inner hole in the inner teeth of the conductive slip ring is only dozens of levels, the section of the electronic mounting wire is small, and the diameter of the electronic mounting wire after wire cutting is also only dozens of levels, so that the distance between two sides is only several levels when the punching alignment operation is carried out. Because the diameter of the electronic installation wire is small, the material is soft, and the bending phenomenon is easy to generate, the process operation level of operators is strictly required, the consistency and the reliability of the product quality are difficult to ensure, the product productivity is greatly restricted, and the subsequent procedures are influenced.

At present, operators generally adopt a traditional handheld electric soldering iron to weld, and quality problems of infirm welding, incorrect position and the like easily occur due to the limitation of skill level of personnel. And because the annual output of the slip ring component is high, each product needs to be manually welded by a skilled operator, and the product productivity and the qualification rate are low.

Disclosure of Invention

The invention solves the technical problems that: the defects of the prior art are overcome, the precision automatic welding device for the conductive slip ring is provided, errors caused by manual welding operation of an operator are reduced, and the consistency and reliability of the welding quality of the conductive slip ring and an electronic installation wire are improved.

The technical scheme of the invention is as follows:

a precise automatic welding device for a conductive slip ring comprises a base, a conductive slip ring pickup system, an x-direction guide rail, a connecting frame, an automatic tin applying system, a laser welding system, a perforation alignment system, a slip ring base, a z-direction guide rail, a slip ring tray and a y-direction guide rail; wherein, the base is a horizontally placed plate-shaped structure; the y-direction guide rail is fixedly arranged on the upper surface of the base along the y direction; the guide rail in the x direction is butted with the guide rail in the y direction along the x direction; the x-direction guide rail moves along the y direction relative to the y-direction guide rail; the guide rail in the z direction is vertically butted with the guide rail in the x direction; realizing the horizontal movement of the guide rail in the z direction relative to the guide rail in the x direction; the connecting frame is in butt joint with the z-direction guide rail, so that the connecting frame moves along the z direction relative to the z-direction guide rail; the conductive slip ring pickup system is fixedly arranged on the connecting frame; the automatic tin applying system, the laser welding system, the perforation alignment system and the slip ring base are all arranged on the upper surface of the base; the slip ring charging tray is arranged on the upper surface of the slip ring base.

In the above precise automatic welding device for the conductive slip rings, n conductive slip rings are uniformly arranged in an array on the upper surface of the slip ring tray; n is equal to or greater than 16, and n is a positive integer.

In the above precision automatic welding device for the conductive slip ring, the slip ring base is fixedly connected; the slip ring tray moves along the x direction and moves along the y direction relative to the slip ring base respectively.

In the above mentioned precision automatic welding device for conductive slip ring, the conductive slip ring pick-up system comprises a first vision camera, a coaxial light source and a pick-up device; the first vision camera is fixedly connected with the connecting frame; the lens of the first vision camera is vertically downward along the z direction; the coaxial light source is arranged on the side wall of the lens of the first vision camera; the pick-up device is of an inverted L-shaped structure; the pickup device is fixedly sleeved on the outer wall of the first vision camera.

In the above precise automatic welding device for the conductive slip ring, the working process of the conductive slip ring pickup system is as follows:

the connecting frame moves along the y-direction guide rail and the x-direction guide rail to drive the conductive slip ring pickup system to move above the slip ring material tray; the picking device is roughly aligned with the preset conductive slip ring to be picked in the vertical direction; the coaxial light source is used for conducting light supplementing irradiation on the conductive slip ring to be picked up; a first vision camera takes an image; according to the image, controlling a slip ring tray to perform fine adjustment along the x direction and the y direction relative to a slip ring base; the pickup device is accurately aligned to the conductive slip ring to be picked; the connecting frame moves vertically downwards along the guide rail in the z direction; the picking-up of the conductive slip ring to be picked up by the picking-up device is realized; the conductive slip ring pickup system drives the conductive slip ring to move to a preset position; the conductive slip ring is vertically arranged in the axial direction.

In the above precise automatic welding device for the conductive slip ring, the perforation alignment system comprises a stand column and a wire feeding device; wherein, the upright post is vertically and fixedly arranged on the upper surface of the base; the wire feeding device is arranged on the side wall of the upright post; and the wire feeding device realizes translation in the x direction, the y direction and the z direction relative to the upright post.

In the above precise automatic welding device for the conductive slip ring, the working process of the perforation alignment system is as follows:

the wire feeding device moves in the x direction, the y direction and the z direction relative to the upright post, so that the wire feeding device moves to the vertical lower end of the conductive slip ring at the preset position; the wire feeding device stretches an external electronic installation wire into the conductive sliding ring; the top end of the external electronic installation wire is horizontal to the upper surface of the conductive slip ring.

In the above precise automatic welding device for the conductive slip ring, the automatic tin applying system comprises a holder, a tin barrel and a tin head; wherein, the fixing device is fixedly arranged on the upper surface of the base; the tin bucket is arranged on the side wall of the retainer; the tin head is fixedly communicated with the tin barrel; the tin barrel moves in the x direction, the y direction and the z direction relative to the retainer; filling tin paste in the tin bucket; after the external electronic installation wire and the conductive slip ring are installed; the tin barrel moves in the x direction, the y direction and the z direction relative to the retainer; the tin head is aligned to the welding hole on the upper surface of the conductive slip ring; outputting the solder paste in the tin barrel to a welding hole of the conductive slip ring through the tin head; after the output of the solder paste is finished, the tin barrel drives the tin head to be far away from the conductive slip ring.

In the above precise automatic welding device for the conductive slip ring, the laser welding system comprises a support, a rotating plate and a laser; wherein, the bracket is fixedly arranged on the upper surface of the base; the rotating plate is arranged on the side wall of the top end of the bracket; the laser is fixedly arranged on the rotating plate; the rotating plate is rotatably connected with the support to drive the laser to rotate around the support.

In the above precise automatic welding device for the conductive slip ring, the working process of the laser welding system is as follows:

the automatic tin applying system outputs tin cream to a welding hole of the conductive slip ring; the rotating plate drives the laser to rotate around the bracket; and the laser is aligned to the solder paste to complete the welding.

Compared with the prior art, the invention has the beneficial effects that:

(1) the automatic feeding and discharging system of the conductive slip ring is adopted, so that the conductive slip ring is free of stress in the moving process, the surface of a part is guaranteed to be free of scratches, the conductive slip ring and the electronic installation wire can be guaranteed to be safe and free of damage in the automatic welding process, and the welded conductive slip ring and the welded electronic installation wire are only subjected to the suction force and the self gravity of a slip ring sucker in the discharging process;

(2) according to the invention, the charging tray base is provided with fine tuning structures in mutually perpendicular directions, and the top of the charging tray base is provided with the adjustable screw, so that accurate positioning in X-axis and Y-axis directions can be realized when the initial position of the slip ring charging tray is precisely adjusted, and the consistency of the slip ring charging tray in two-dimensional directions is ensured;

(3) According to the three-dimensional direction fine adjustment structure for the tin applying barrel space, the three-dimensional space position and the three-dimensional space direction of the needle opening of the tin applying barrel can be precisely adjusted through the output image of the vision camera and the flexible connecting plate structure, so that the consistency of the needle opening at the initial position is realized, and the same initial state of the device is ensured;

(4) the automatic fine-tuning movement module used in the invention can realize the accurate positioning of the conductive slip ring and the electronic installation wire, and the perforation contraposition operation of the end part of the wire core of the electronic installation wire can be ensured by combining the image processing circle center detection algorithm, so that the precise automatic assembly of the conductive slip ring and the electronic installation wire can be realized, and the assembly efficiency and the success rate can be improved;

(5) the invention adopts the laser fine adjustment mechanism, can realize defocusing operation along the direction of 45 degrees by adjusting the laser fine adjustment mechanism, can accurately determine the position and the size of the focus at the emitting port of the laser, and improves the stability and the reliability of the device.

Drawings

FIG. 1 is a schematic view of an automatic welding apparatus according to the present invention;

FIG. 2 is a schematic view of a slip ring tray of the present invention;

FIG. 3 is a schematic view of a conductive slip ring pick-up system of the present invention;

FIG. 4 is a schematic view of a via alignment system according to the present invention;

FIG. 5 is a schematic view of an automatic tin applying system according to the present invention;

Fig. 6 is a schematic view of a laser welding system of the present invention.

Detailed Description

The invention is further illustrated by the following examples.

The invention provides a precise automatic welding device for a conductive slip ring, which is used for automatically welding a slip ring assembly, namely the slip ring and an electronic installation wire. Based on a spatial multi-degree-of-freedom fine-tuning movement mechanism and an image processing and identifying algorithm, the dependence on the skill level of an operator is eliminated, the problem of welding accuracy between the conductive slip ring and the small-section electronic installation wire is solved, the consistency and reliability of the product quality are ensured, the product rejection rate is reduced, and the welding productivity of the conductive slip ring is improved.

Based on the space multi-degree-of-freedom fine-tuning movement mechanism and the image processing and recognition algorithm, the automatic grabbing, feeding and discharging, image processing circle center detection, automatic perforation and alignment, and automatic tin applying and laser welding operations of the conductive slip ring 11 are realized. The invention adopts a modular design, ensures that a module with problems can be quickly replaced when a station fails, and does not influence the assembly efficiency of the system. As shown in fig. 1, the precision automatic welding device for the conductive slip ring mainly includes a base 1, a conductive slip ring pickup system 2, an x-direction guide rail 3, a connecting frame 4, an automatic tin applying system 5, a laser welding system 6, a perforation alignment system 7, a slip ring base 8, a z-direction guide rail 9, a slip ring tray 10 and a y-direction guide rail 12; wherein, the base 1 is a horizontally placed plate-shaped structure; the y-direction guide rail 12 is fixedly arranged on the upper surface of the base 1 along the y direction; the x-direction guide rail 3 is butted with the y-direction guide rail 12 along the x direction; the movement of the x-direction guide rail 3 in the y direction relative to the y-direction guide rail 12 is realized; the guide rail 9 in the z direction is vertically butted with the guide rail 3 in the x direction; the horizontal movement of the z-direction guide rail 9 relative to the x-direction guide rail 3 along the x direction is realized; the connecting frame 4 is in butt joint with the z-direction guide rail 9, so that the connecting frame 4 moves along the z direction relative to the z-direction guide rail 9; the conductive slip ring pickup system 2 is fixedly arranged on the connecting frame 4; the automatic tin applying system 5, the laser welding system 6, the perforation alignment system 7 and the slip ring base 8 are all arranged on the upper surface of the base 1; the slip ring tray 10 is arranged on the upper surface of the slip ring base 8. The slip ring base 8 is fixedly connected with the slip ring base; the slip ring tray 10 is moved in the x direction and the y direction relative to the slip ring base 8, respectively.

The upper surface of the slip ring tray 10 is uniformly provided with n conductive slip rings 11 in an array; n is equal to or greater than 16, and n is a positive integer. As shown in fig. 2. The initial position of the conductive slip ring 11 is placed at the slip ring tray 10 according to an array, and the slip ring tray 10 is provided with a groove structure for radially positioning the slip ring 11. Each groove has a stop inside for achieving circumferential positioning of the slip ring 11. The slip ring charging tray 10 after being fully loaded is placed on the slip ring base 8, and the slip ring base 8 is internally provided with a fine adjustment structure in the direction perpendicular to each other, and the top X-axis direction and the Y-axis direction of the fine adjustment structure are provided with adjustable screws, so that the fine adjustment of the slip ring charging tray 10 when the initial position is placed can be realized, and the slip ring charging tray 10 is accurately positioned in the two-dimensional direction.

The conductive slip ring pickup system 2 comprises a first vision camera 21, a coaxial light source 22 and a pickup device 23; wherein, the first vision camera 21 is fixedly connected with the connecting frame 4; and the lens of the first vision camera 21 is vertically downward in the z-direction; the coaxial light source 22 is arranged on the lens side wall of the first vision camera 21; the pick-up device 23 is of an inverted L-shaped structure; the pickup device 23 is fixedly attached to the outer wall of the first vision camera 21 as shown in fig. 3. The working process of the conductive slip ring pickup system 2 is as follows: the connecting frame 4 moves along the y-direction guide rail 12 and the x-direction guide rail 3 to drive the conductive slip ring pickup system 2 to move above the slip ring tray 10; the picking device 23 is roughly aligned with the preset conductive slip ring 11 to be picked in the vertical direction; the coaxial light source 22 performs light supplementing irradiation on the conductive slip ring 11 to be picked up; the first vision camera 21 takes an image; according to the image, controlling the slip ring tray 10 to perform fine adjustment along the x direction and the y direction relative to the slip ring base 8; the pickup device 23 is accurately aligned to the conductive slip ring 11 to be picked up; the connecting frame 4 moves vertically downward along the z-direction guide rail 9; the picking-up of the conductive slip ring 11 to be picked up by the picking-up device 23 is realized; the conductive slip ring pickup system 2 drives the conductive slip ring 11 to move to a preset position; the conductive slip ring 11 is vertically placed axially. After the pick-up device 23 moves to the position of the conductive sliding ring 11 to be picked up along with the electric four-axis displacement table, the conductive sliding ring 11 is sucked from the sliding ring tray 10 through negative pressure, and the conductive sliding ring 11 is grabbed and then located at a unified designated position. The first vision camera 21 realizes photographing processing of images, and the coaxial light source 22 realizes an auxiliary light supplementing and illuminating function when used for photographing images.

The perforation alignment system 7 comprises a vertical column 71 and a wire feeding device 72; wherein, the upright column 71 is vertically and fixedly arranged on the upper surface of the base 1; the wire feeding device 72 is mounted on the side wall of the upright column 71; and the wire feeding device 72 performs translation in the x-direction, the y-direction and the z-direction with respect to the column 71, as shown in fig. 4. The working process of the perforation alignment system 7 is as follows: the wire feeding device 72 moves in the x direction, the y direction and the z direction relative to the upright post 71, so that the wire feeding device 72 moves to the vertical lower end of the conductive slip ring 11 at the preset position; the wire feeding device 72 extends an external electronic installation wire into the conductive slip ring 11; the top end of the external electronic installation wire is horizontal to the upper surface of the conductive slip ring 11. The wire feeding device 72 includes a driving roller and a driven roller. The vertical upward movement of the external electronic installation wire is realized by the mutual friction force generated between the closing of the two rollers and the external electronic installation wire

The automatic tin applying system 5 comprises a holding frame 51, a tin barrel 52 and a tin head 53; wherein, the fixing device is fixedly arranged on the upper surface of the base 1; the tin bucket 52 is arranged on the side wall of the holder 51; the tin head 53 is fixedly communicated with the tin barrel 52; and the tin bucket 52 realizes the movement in the x direction, the y direction and the z direction relative to the holding rack 51; the tin barrel 52 is filled with tin paste; after the external electronic installation wire and the conductive slip ring 11 are installed; the tin barrel 52 moves in the x direction, the y direction and the z direction relative to the holder 51; the tin head 53 is aligned with the welding hole on the upper surface of the conductive slip ring 11; outputting the solder paste in the tin barrel 52 to the welding hole of the conductive slip ring 11 through the tin head 53; after the output of the solder paste is completed, the tin barrel 52 drives the tin head 53 away from the conductive slip ring 11, as shown in fig. 5. The automatic tin applying system 5 further comprises a second vision camera; the micro motion in the three-dimensional direction of the space can be realized through the three-dimensional fine adjustment mechanism of the second vision camera, and the tail end position of the tin applying head 53 can be accurately detected.

The laser welding system 6 includes a holder 61, a rotating plate 62, and a laser 63; wherein, the bracket 61 is fixedly arranged on the upper surface of the base 1; the rotating plate 62 is provided at the top end side wall of the bracket 61; the laser 63 is fixedly arranged on the rotating plate 62; the rotating plate 62 is rotatably connected to the bracket 61 to drive the laser 63 to rotate around the bracket 61, as shown in fig. 6. The working process of the laser welding system 6 is as follows:

the automatic tin applying system 5 outputs tin paste to a welding hole of the conductive slip ring 11; the rotating plate 62 drives the laser 63 to rotate around the bracket 61; and the laser is aligned to the solder paste to complete the welding. The rotation of the laser 6345 degrees can be realized through the rotating plate 62, and the focal position and size at the emitting port of the laser 63 can be accurately determined. The laser light-emitting position is adjusted according to the indicator light of the laser 63, the distance is adjusted according to the light spot gathering size, and the welding requirement is met.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.

Claims

1. The utility model provides a lead accurate automatic welder of sliding ring which characterized in that: the device comprises a base (1), a conductive slip ring pickup system (2), an x-direction guide rail (3), a connecting frame (4), an automatic tin applying system (5), a laser welding system (6), a perforation alignment system (7), a slip ring base (8), a z-direction guide rail (9), a slip ring tray (10) and a y-direction guide rail (12); wherein, the base (1) is a horizontally placed plate-shaped structure; the y-direction guide rail (12) is fixedly arranged on the upper surface of the base (1) along the y direction; the x-direction guide rail (3) is butted with the y-direction guide rail (12) along the x direction; the x-direction guide rail (3) moves along the y direction relative to the y-direction guide rail (12); the guide rail (9) in the z direction is vertically butted with the guide rail (3) in the x direction; the horizontal movement of the z-direction guide rail (9) along the x direction relative to the x-direction guide rail (3) is realized; the connecting frame (4) is butted with the z-direction guide rail (9), so that the connecting frame (4) moves along the z direction relative to the z-direction guide rail (9); the conductive slip ring pickup system (2) is fixedly arranged on the connecting frame (4); the automatic tin applying system (5), the laser welding system (6), the perforation alignment system (7) and the slip ring base (8) are all arranged on the upper surface of the base (1); the slip ring material tray (10) is arranged on the upper surface of the slip ring base (8);

the upper surface of the slip ring tray (10) is provided with n conductive slip rings (11) which are uniformly arranged in an array; n is more than or equal to 16 and is a positive integer;

The slip ring base (8) is fixedly connected with the base (1); the slip ring material tray (10) moves along the x direction and the y direction relative to the slip ring base (8) respectively;

the conductive slip ring pickup system (2) comprises a first vision camera (21), a coaxial light source (22) and a pickup device (23); wherein the first vision camera (21) is fixedly connected with the connecting frame (4); and the lens of the first vision camera (21) is vertically downward along the z direction; the coaxial light source (22) is arranged on the lens side wall of the first vision camera (21); the pick-up device (23) is of an inverted L-shaped structure; the pickup device (23) is fixedly sleeved on the outer wall of the first vision camera (21);

the working process of the conductive slip ring pickup system (2) is as follows:

the connecting frame (4) moves along a y-direction guide rail (12) and an x-direction guide rail (3) to drive the conductive slip ring pickup system (2) to move above a slip ring material tray (10); the picking device (23) is roughly aligned with the preset conductive slip ring (11) to be picked in the vertical direction; the coaxial light source (22) is used for conducting light supplementing irradiation on the conductive slip ring (11) to be picked up; a first vision camera (21) takes an image; according to the image, controlling a slip ring tray (10) to perform fine adjustment along the x direction and the y direction relative to a slip ring base (8); the pick-up device (23) is accurately aligned with the conductive slip ring (11) to be picked up; the connecting frame (4) vertically moves downwards along the guide rail (9) in the z direction; the picking-up of the conductive slip ring (11) to be picked up by the picking-up device (23) is realized; the conductive slip ring pickup system (2) drives the conductive slip ring (11) to move to a preset position; the conductive slip ring (11) is vertically arranged in the axial direction;

The perforation alignment system (7) comprises a vertical column (71) and a wire feeding device (72); wherein, the upright column (71) is vertically and fixedly arranged on the upper surface of the base (1); the wire feeding device (72) is arranged on the side wall of the upright post (71); and the wire feeding device (72) realizes translation in the x direction, the y direction and the z direction relative to the upright post (71).

2. The precision automatic welding device for the conductive slip ring as claimed in claim 1, wherein: the working process of the perforation alignment system (7) is as follows:

the wire feeding device (72) moves in the x direction, the y direction and the z direction relative to the upright post (71), so that the wire feeding device (72) moves to the vertical lower end of the conductive slip ring (11) at the preset position; the wire feeding device (72) extends an external electronic installation wire into the conductive slip ring (11); the top end of the external electronic installation wire is horizontal to the upper surface of the conductive slip ring (11).

3. The precision automatic welding device for the conductive slip ring as claimed in claim 2, wherein: the automatic tin applying system (5) comprises a retainer (51), a tin barrel (52) and a tin head (53); wherein, the retainer (51) is fixedly arranged on the upper surface of the base (1); the tin barrel (52) is arranged on the side wall of the retainer (51); the tin head (53) is fixedly communicated with the tin barrel (52); the tin barrel (52) moves in the x direction, the y direction and the z direction relative to the holding frame (51); the tin barrel (52) is filled with tin paste; after the external electronic installation wire and the conductive slip ring (11) are installed; the tin barrel (52) moves in the x direction, the y direction and the z direction relative to the holding frame (51); the tin head (53) is aligned to the welding hole on the upper surface of the conductive slip ring (11); outputting the tin paste in the tin barrel (52) to a welding hole of the conductive slip ring (11) through a tin head (53); after the output of the solder paste is finished, the tin barrel (52) drives the tin head (53) to be far away from the conductive slip ring (11).

4. The precision automatic welding device for the conductive slip ring as claimed in claim 3, wherein: the laser welding system (6) comprises a bracket (61), a rotating plate (62) and a laser (63); wherein, the bracket (61) is fixedly arranged on the upper surface of the base (1); the rotating plate (62) is arranged at the top end side wall of the bracket (61); the laser (63) is fixedly arranged on the rotating plate (62); the rotating plate (62) is rotatably connected with the support (61) to drive the laser (63) to rotate around the support (61).

5. The precision automatic welding device for the conductive slip ring as claimed in claim 4, wherein: the working process of the laser welding system (6) is as follows:

the automatic tin applying system (5) outputs tin cream to a welding hole of the conductive slip ring (11); the rotating plate (62) drives the laser (63) to rotate around the bracket (61); and the laser is aligned to the solder paste to complete the welding.